<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="utf-8">
	<title>\</title>
</head>
<body>
	<script type="text/javascript">
		console.log('before');
		setTimeout(() => {
			console.log('时间函数执行了')
		}, 2000);
		console.log('after');

	</script>
</body>
</html>